update to the latest netmap snapshot.

This includes the following:
- use separate memory regions for VALE ports
- locking fixes
- some simplifications in the NIC-specific routines
- performance improvements for the VALE switch
- some new features in the pkt-gen test program
- documentation updates

There are small API changes that require programs to be recompiled
(NETMAP_API has been bumped so you will detect old binaries at runtime).

In particular:
- struct netmap_slot now is 16 bytes to support an extra pointer,
  which may save one data copy when using VALE ports or VMs;
- the struct netmap_if has two extra fields;

MFC after:	3 days

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/conf/files b/sys/conf/files
index 29e6b80376bf..3c20141d4f2f 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -1881,6 +1881,8 @@ dev/nand/nfc_if.m		optional nand
 dev/ncv/ncr53c500.c		optional ncv
 dev/ncv/ncr53c500_pccard.c	optional ncv pccard
 dev/netmap/netmap.c		optional netmap
+dev/netmap/netmap_mem2.c	optional netmap
+# compile-with "${NORMAL_C} -Wconversion -Wextra"
 dev/nge/if_nge.c		optional nge
 dev/nxge/if_nxge.c		optional nxge \
 	compile-with "${NORMAL_C} ${NO_WSELF_ASSIGN}"